Results 1 to 10 of about 152,057 (309)

High Frequency Transformers for Solid-State Transformer Applications

open access: yesApplied Sciences, 2023
This paper focuses on the study of the high frequency transformer incorporated in solid- state transformers, specifically on the development of the steps that enable the design of an optimized high frequency transformer and its equivalent model based on ...
Nuno Santos   +5 more
doaj   +3 more sources

Frequency-aware vision transformers for high-fidelity super-resolution of Earth system models [PDF]

open access: yesScientific Reports
Super-resolution can play an essential role in enhancing the spatial fidelity of Earth System Model outputs, allowing fine-scale structures highly beneficial to climate science to be recovered from coarse simulations.
Ehsan Zeraatkar   +2 more
doaj   +2 more sources

Augmented Models of High-Frequency Transformers for SMPS [PDF]

open access: yes2009 20th International Zurich Symposium on Electromagnetic Compatibility, 2009
The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels
Canavero, Flavio   +3 more
core   +4 more sources

Optimal design of minimal footprint high frequency transformer [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2021
Transformer design procedure may vary essentially in respect of the transformer type and its operating frequency (ranging between 50/60 Hz and a few megahertz).
Banumathy Jeyapradha Ravichandran   +1 more
doaj   +1 more source

Practical Study of Mixed-Core High Frequency Power Transformer

open access: yesMagnetism, 2022
The design of medium- to high-frequency power electronics transformer aims not only to minimize the power loss in the windings and the core, but its heat removal features should also allow optimal use of both core and copper.
Arun Kumar Paul
doaj   +1 more source

Characteristics Analysis and Technical Prospect of Low-Frequency Main Transformer for Offshore Wind Power

open access: yes南方能源建设, 2023
[Introduction] Low-frequency alternating current power transmission technology has attracted wide attention. Although its theoretical research continues to go deeper, there are still many problems to be solved before its engineering implementation in ...
Xi YANG   +4 more
doaj   +1 more source

Effects of power transformer high-frequency equivalent circuit parameters non-uniformity on fault diagnosis using SFRA test

open access: yesAin Shams Engineering Journal, 2022
The electric power transformer is an essential component of an electrical power system because it regulates the voltage level to provide the best possible system operation.
Khalid H. Ibrahim   +2 more
doaj   +1 more source

High-frequency transformation of Rhizobium meliloti [PDF]

open access: yesJournal of Bacteriology, 1988
Transformation of R factor RP4 and its derivative pRK290 from Escherichia coli to Rhizobium meliloti is reported. The efficiency of transformation was in the range of 10(-5) per viable cell. In addition, chromosomal DNA prepared from one R. meliloti strain resistant to streptomycin was transferred to the isoleucine-valine-requiring mutant susceptible ...
J, Courtois, B, Courtois, J, Guillaume
openaire   +2 more sources

Development of a Medium Voltage, High Power, High Frequency Four-Port Solid State Transformer

open access: yesCES Transactions on Electrical Machines and Systems, 2022
The power and voltage levels of renewable energy resources is growing with the evolution of the power electronics and switching module technologies.
Ahmad El Shafei   +4 more
doaj   +1 more source

Mine inverter based on isolation and transformation of power electronic transformer

open access: yesGong-kuang zidonghua, 2021
At present, the mine inverter and the power frequency transformer are placed separately, which occupies too much underground working space. And the inverter output voltage has high harmonic content and poor waveform quality.
ZHANG Guilin1,2   +4 more
doaj   +1 more source

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